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    <title>Document</title>
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<body>
    <script>
        function isPrime(num){
            let flag = true ; 
            for( let i = 2 ; i <= num / 2 ; i ++ ){
                if( num % i == 0 ){
                    flag = false ; 
                    break ;
                }
            }
            return flag ;
        }
        let total = 0 ;
        for( let i = 2 ; i < 1000000 ; i ++ ){
            // console.log(i);
            if ( isPrime(i) ){
                total += i ; 
            }
        }
        console.log(total);       //37550402023
    </script>
</body>
</html>